Arizona Gov. Jan Brewer (R) signed into law April 12, 2012, a bill (H.B. 2199) shielding companies from having to disclose information about their environmental infractions when it is produced by their own self-audits.

The information would still have to be provided to the state. Companies would not gain immunity from enforcement merely by auditing themselves. Many other states have enacted some form of the so-called environmental audit and immunity laws.